Rock-breaker



(No Model.) 2 Sheets-Sheet 1.

L. RADOVIOH.

ROCK BREAKER.

No. 286,223. Patented Oct. 9, 1883.

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2 Sheets-Sheet 2.

(No Model.)

L. RADOVIGH.

ROCK BREAKER.

No. 286.223. Patented Oct. 9, 1883.

V Ziwen'lbn za X ELIAQZQ I to produce a shaking motion of the screen M Unrrnn Starts arnsir @rricn. 5

LAZARUS RADOVIOH, OF SAN FRANCISCO, CALIFORNIA.

ROCK-BREAKER.

SPECIFICATION forming partof Letters Patent No. 286,223, dated October 9, 1883. Application filed February 17, 18,83. (No model.)

20 all whom it may concern:

Be it known that I, LAZARUS RADOVIOI'I, a citizen of the United States, residing in the city and county of San Francisco, and State of California, have invented a new and useful Improvement in Rock-Breakers, of which the following is a specification.

My invention relates to improvements in machinery for breaking and pulverizing rock in which it is desirable to either break rock to a given size or to pulverize the same to a fine sand or dust.

The following is the construction and operation of my improved machine:

Figure 1 is a side elevation; Fig. 2-, a plan view; Fig. 3, a longitudinal section; Fig. 4-, an end view; and Fig. 5, a detached part, show ing the lever which operates the lower screen laterally.

A represents the frame of the machine; I ihe bed-frame; C, the flywheels; D, the axle; ll, the cam; F, the eccentric or cam-yoke; G, the aXle-fulcrum of the muller lever or bar A, to which the shoe H is attached. I I is the back shoe, and J the back jaw.

K represents the feed-hopper; L, the upper screen; M, the lower screen, and O the elbow lever, which is operated by the connecting-bar N for the purpose of shaking the screen L longitudinally. j

I represents the hangers by which the screen L is suspended.

Q represents the connecting-bar, which operates the elbow-lever It, which operates the rock-shaft S, thereby operating the arms or levers T to give lateralmotion' to the lower screen, M, which has anti-friction rolls, which have their bearings upon the rails Z. The setscrew V is designed to tighten the lever B upon the rock-shaft and to allow the adjustmcnt'of the position of the arms T.

The lid or cover IV is designed to serve as a hopper -support and to be operated as a shaker to assist in feeding the rock into the machine. The rock being fed into the hopper K,

the shaft D and the flywheels 0, being revolved, revolve the cam E, thus operating the muller-lever A and moving the shoe, giving the same a downward and forward motion,

gradually closing the jaws and bringing the shoes H and I nearer together with a crushing and grinding force upon the rock, which, as fast as broken, is dropped down and discharged upon the screen L.

The fineness to which the ore or other rock is crushed is regulated by the set-screws Y, and the angle to which the jaw and shoe J and I are set regulates. the rapidity of crushing.

lVhere soft rock is crushed, the shoe maybe set nearer to the perpendicular,and the more direct pressure will crush much faster, while in crushing hard rock the jaw J must be set back more at the top, whereby a less direct pressure or resistance is secured by the action on the shoe I.

In fine crushing, the jaws may be set closely together by setting up the shoe I quite close to the shoe H, and the crushed rock falls upon the screen L.

The rod N, operating the elbow-lever 0, gives a longitudinal vibration or shaking motion to the screen L, which allows a partial screening, the coarse lumps passing over the lower or discharging end of the screen, and the finer material falling upon the screen M in the usual manner in working ore. The lower screen, M, is shaken laterally by means of the rod or connecting-bar Q, which operates the lever B- at each stroke of the yoke F, to which it is attached. The lever It is attached to the rockshaft S by the set-screw V, thus regulating the adjustment of the screen M laterally, The shoe II, at each vibration of the muller-lever A strikes the lower surface of the lid \V and shakes the ore-hopper K, which is pivoted at X, thus materially assisting the discharge of the ore by preventing its clogging, and effeeting a shaking of the rock in the hop per at the same time that it is affected and moved by the action of the shoe H, thus keeping a connected motion between the ore in the hopper K and that between the jaws H and I. I have arranged the fulcrum G of the mullerlever A in the position shown in the drawings, so as to produce a grinding .as well as crush ing effect.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-

1. The combination of the crushing-jaws and .H, in combination with the pivoted feed-box the muller-lever A having yoke F, with the K, as and for the purposes set forth. connecting-bars N and Q, the elbow-levers O l It, the hangers 1?, screens L and M, the rock- LAZARUS RADOVICH, 5 shaft S,having1ever-arms T,rai1s'Z, and anti- Witnesses:

friction rolls, as and for the purposes set forth. J os. MOGILLIORAY, 2. The vibrating mullen-lever A? and shoe JOHN H.v REDSTONE. 

